I had a Lambretta LI150 once. Satisfactory for me, until I "lost" it going slowly, but not slowly enough, around a greasy corner right on the crown of the road, the road having bad cambers on each side. I came off, and the scooter continued it's merry way, on it's side, and slowly spinning round on the twist grip with the result that the engine ended up running flat out.
What was worst, was that this three days before my motorcycle test, thus necessitating some urgent repairs to the windscreen.
Peter G. Shaw